CODAP-1117: fix MobX constraint violations in DataSet extend block#2401

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kswenson wants to merge 8 commits intomainfrom

CODAP-1117-dataset-mobx-compliance

Commits on Feb 15, 2026

CODAP-1117: fix MobX constraint violation in cachedFnWithArgsFactory

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Commits on Feb 17, 2026

CODAP-1117: fix lint in cachedFnWithArgsFactory; update CLAUDE.md

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CODAP-1117: fix MobX constraint violation in Collection.completeCaseGroups

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CODAP-1117: skip additive case processing when full rebuild is pending

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CODAP-1117: fix empty-array truthiness bug in Collection.completeCaseGroups

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CODAP-1117: ensure case validation before snapshot serialization

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CODAP-1117: add tests for empty-array fallthrough and invalidated addCases

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CODAP-1117: fix MobX constraint violations in DataSet extend block

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